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' G. vA. GOODENOUGH.-

DAMPER RBGULAToR.'

No.. 377,557l Pmnted'febf7, '18.88.

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UNITED STATESl PATENT" OFFICE.

GEORGE A. GOODENOUGH, OF GREEN POINT, NEW YORK.

DAM PER-REGULATOR.

SPECIFICATION forming part lof Letters Patent No. 3771557, dated February 7, 1888.

Application tiled August 2G, 1887. Serial No. 247,953. (No model.) A

l will describe in det-ail a furnace-regulator embodying my improvement, and then pointv out the novel features in claim.

The accompanying drawing illustrates a vertical section of ay damper-regulator embodying my improvement, a portion of a steamboiler with which said damper-regulator communicates, and a portion of a due for the escaping products of combustion from the furnace, showing a damper arranged therein.

A designates a cylinder of metal. This cylinder is open at the bottom and is provided with an outwardly-extending flange, a. From the flange a extend projecting portions a'. The upper end of this cylinder is closed, except as hereinafter described.

B designates a pipe leading from and communicating with a steam-boiler, B', which latter may be of any desired construction. The pipeB communicates by a suitable coupling with avalve-chest, C. Vithin the valve-chest O is arranged a valve, D, adapted to be slid to and fro in the valve-chest. It is so constructed as to iit snugly in the valve-chest, and may be provided with suitable packing tol form a steam-tightjoint. The valve-chest is provided upon its lower side with an externally screwthreaded nozzle, b, which engages with a screw-threaded aperture in the upper end of the cylinder A. Through this nozzle extends a port, b', opening both upon the inside of the valve-chest and also upon the inside of the cylinder A. The upper side of the valvechest is provided with a nozzle, c, similar to the nozzle b, and provided with a port, c', similar to the port b and in/line therewith. The'valve-chest is also provided upon one side of the valve D with a chamber, E, which chamber is Apreferably of greater diameter than that portion of the interior of the valvechamber in which the vvalve moves. The rear end of the valve is provided with an enlarged portion or head, e, adapted to move to and fro in said chamber with the valve. A

spring, F, (here shown as a coiled spring.) is arranged in said'chamber and adapted to bear at one end upon the head e of the valve and upon its other end againsta plug,f, fitting the chamber. This plug is screw-threaded near its outer end and engages with the screwthreaded outer opening of the chamber E. This plug may be adjusted lengthwise of the chamber to vary the resistance which the spring will offer to themovement of the valve, Y

if desirable.

A The valve D is provided with a port, kg. This port opens at one end opposite the connection with the pipe B and extends for a distance in the direction of the length of the valve,and then at approximate right angles to the length of the valve-opening upon the side of the latter. When this valve is moved into the position shown in the drawing, -free passage is afforded for steam from the boiler to the interior of the cylinder- A, because the port g is in open communication with the port b. The valve will be moved into such position whenever the pressure of steam in the boiler is sufficient to overcome the resistance -V of the spring F. 4

h designates a port extending diametrically through the valve D. It is arranged,as shown,

at the rear of the port g. Whenever the resistance of the spring F isV sufficient to overcome the pressure of steam from the boiler, the spring vwill move the valve forward into such position that the port 'h will be brought linto open communication with the ports b and c. To the nozzle c is attached a pipe leading to the atmosphere. When, therefore, the port h is in open communication Vwith the ports b'c, any steam 'which may be in the cylinder A may freely escape tothe air, and steam-pressure in the cylinder will be destroyed. The cylinder A is filled or nearly filled with Water.

I have shown a plug, t', near the upper end of the cylinder for admitting water to the same.

H designatesa piston or plunger extending into the cylinder A, near the lower extremity thereof. This piston is hollow, as shown,and its upper end is closed by a plug, s,.having a screw-threaded connection with the cylinder.

I designates a rod extending upwardly through the hollow piston H and having a pivotal connection with a lug, i', upon the un- IOU jections a on the flange a.

der side of the plug s. The other end of the rod I is pivotally connected toa lever, J. The lever J is pivotally connected near one end to a rod or post extending from one of the pro- I have shown a chain, j, secured to and depending from the other of the projections a on the flange a and connected near its other end with the lever J. This chain prevents atoo extended downward movement of the lever J. Y

The piston H works in a stufng-box, K, formed in a metal plate, k, secured to the flange a of the cylinder A by bolts or otherwise. Between the plate la and the flange aof the cylinder a packing-ring, Z, may be placed, which acts in conjunction with the stuffingbox to render the lower end of the cylinder water-tight.

L designates a damper, arranged as shown, in the flue, by which products of combustion from the furnace are carried off. This damper may be of the usual or any desired construction. It is shown as provided with a crank upon one side, to which crank isvconnected a rod, Z', the other end of which rod is connected to the lever J. The damperis normally open, and is held in such position by a weight, Z2, connected with the damper and operating to maintain it in such position in a well-known manner.

When steam-pressure in the boiler increases beyond a desired point, the valve D is forced backwardly until the ports g and b are in communication with each other, as previously explained, and the steam-pressure is then caused to operate upon the column of water contained in the cylinder A, by which means the piston H will be forced downwardly. The rod I, in connection with the piston, is thereby caused to move the lever J downwardly, causing the rod l to move the damper to close it. When steam-pressure in the boiler has decreased suficiently, the valve D will return to its normal position, as previously explained, or, in other words, into a position in which the port h will be in communication with the ports b c', so as to destroy steam-pressure in the cylinder A. The weight P on the damper will rock the damper into an open position, and also elevate the lever J and the piston H into a position to be again operated upon when steam-pressure shall be undulyincreased.

This damper-regulator may be supported by brackets or otherwise upon a. wall or other suitable support adjacentto the boiler.

By arranging the cylinder vertically, so that the column of water therein is above the piston and steam-pressure is exerted above the column'of water, the regulator is caused to operate more delicately than would be the case if the column of water were below the piston and the latter elevated, because in the former case steam-pressureis assisted by gravity.

What I claim as my invention, and desire to secure by Letters Patent, is-

The combination, with a steam-boiler and a flue for carrying off th-e products of combustion from a furnace, of a damper arranged in said Hue, a lever with which said damper is connected, a cylinder containing water, a piston in said cylinder connected to said lever, a valve-chest provided with a port opening to the external atmosphere anda port opening upon the interior of said cylinder at the end thereof opposite said piston, a valve provided with a 4port communicating with the boiler and adapted to communicate with said port opening into the interior of the cylinder to admit steam against and above the water in the cylinder and another port adapted to communicate with the port in the valve-chest opening to the external atmosphere and also with the port opening into the interior of the cylinder, and a spring arranged in the valvechest for moving said valve in one direction, substantially as specified.

GEORGE A. GooDENoUGH.

Witnesses:

J ENNIE GREEK, ALBERT RABAN. 

